System and method for failover

Details System and method for failover System and method for failover

2007-12-25

2007-12-25

Maskulinski, Michael C (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

Reexamination Certificate

active

11407162

ABSTRACT:
A node1and a node2are in a mutual failover relationship and share information used in failover through a shared LU. Of filesystems FS1A, FS1B that are mounted at the node1, the actions of level1are allocated to FS1A and the actions of level2are allocated to FS1B. The level1filesystem FS1A is taken over to the node2simultaneously with commencement of failover. The level2filesystem FS1B is taken over to the node2when an access request for FS1B is generated after commencement of failover. In this way, business services with high availability can be restarted at an early stage.

REFERENCES:
patent: 6247139 (2001-06-01), Walker et al.
patent: 6748550 (2004-06-01), McBrearty et al.
patent: 2003/0018927 (2003-01-01), Gadir et al.
patent: 2003/0051187 (2003-03-01), Mashayekhi et al.
patent: 11-353292 (1999-12-01), None

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